{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb37f6f9dd65af4f71eec7dfcb8d78fff6b2d8199d42dd69085e3deb43c309947",
    "signature": "0x3bea2837dd1de9f38df5a468464736ce10e971c4245cdc3c705cfd96c6342d5e410f9c5c6fe6ad206322fdcbbaa30ea1f62a1c45b4a53ffbde225246d90763c61c",
    "signer": "0x37Ad524d8672413306249c436205581b40BA40c3",
    "userId": "645742671"
  }
}